[n = 18]
| Year / Period | From | To | Established | Ecol. effects |
|---|---|---|---|---|
| unknown | unknown | Serbia Montenegro | unknown | unknown |
| unknown | unknown | Canada (Adirondack lakes) | probably established | some |
| unknown | USSR, Former Area of | China | unknown | no data |
| unknown | unknown | Iran | established | unknown |
| unknown | Unknown | Azores Is | established | unknown |
| unknown | unknown | Syrian Arab Republic | established | unknown |
| unknown | unknown | Turkey | established | unknown |
| 1960 - 1969 | Israel | Uganda | unknown | |
| 1990 - 2000 | unknown | United Kingdom (Lake districts) | established | probably some |
| 1200 - 1650 | United Kingdom | Ireland | established | some |
| 1185 - 1187 | England | Ireland | established | some |
| 1934 | France | Morocco | established | |
| 1938 | Italy | Ethiopia | established | |
| 1949 | France | Spain | established | probably some |
| 1951 | France | Madagascar | not established | |
| 1956 | France | Fodda Qued | not established | |
| 1962 | Unknown | Portugal | established | unknown |
| 1966 | France | Tunisia | probably not established | unknown |